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Home » Flight tickets » 'KLM aircraft on its way to Bangkok involved in incident over Delhi'
'KLM aircraft on its way to Bangkok involved in incident over Delhi'
Sri Ramani Kugathasan / Shutterstock.com
The KLM flight KL 875 from Amsterdam to Bangkok and an EVA Air aircraft from Taiwan were involved in an incident in Indian airspace above the capital Delhi last Sunday. There three passenger planes came dangerously close to each other.
The aircraft's warning systems and intervention by air traffic control prevented a disaster, writes India Today.
The KLM aircraft, a Boeing 777-300ER, was at an altitude of 33.000 feet, over 10 kilometers. A plane from the American National Airlines and a van EVA Air from Taiwan to fly too close together. The pilots of both flights received a signal from the aircraft's warning system.
When she wanted to correct this, the opposite happened and the three aircraft came closer to each other. Thanks to the correct actions of the pilots and air traffic control, the danger eventually passed and the KLM aircraft landed safely at Suvarnabhumi Airport.
The Indian aviation authorities are investigating the incident.
Source: NOS.nl
The National Airlines plane was probably not flying at the right altitude. According to (other) sources, it flew at 31.000 feet, the EVA aircraft at 32.000 feet and KLM at 33.000 feet.
However, 1.000 feet of separation is the normal (vertical) distance between aircraft. Then nothing would have happened. National's aircraft was instructed to swerve, which indicates an incorrect altitude (the person who has to swerve is usually the one who is "wrong". You don't have to correct the rest, because that entails even more).
In practice it works a little differently than you imagine, the person who is “wrong” already stores data, the equipment in the aircraft (both are equipped with ACAS an anti-collision system) and this system does not check whether and who is wrong. , but generates instructions to ascend or descend to one or both aircraft in order to avoid a possible collision, after which air traffic control takes further action. What is published about heights etc. is pure speculation, but it is clear that something went wrong.
Correct and I know how it works. The directions to turn left and the new altitude, of course, came from the Indian ATC. ACAS only indicates to ascend or descend. I should have added that to make it clearer. (You could have omitted your further addition that “it doesn't make any sense”, because it doesn't make any sense).
As I also point out, the highest are no reason to intervene (neither by the system nor by ATC). The 1000 feet is a normal separation altitude. So if there is an intervention, then at least 1 party is not at the right height, that is not speculation but fact.
Acas only indicates that another plane is getting too close.
You continue to fly in your corridor, but default to port.
What the readers do not notice is that an aircraft can also end up in an air pocket, as a result of which an aircraft can simply drop a few hundred meters.
India Today reports:
KLM was at 33.000 feet
EVA was at 32.000 feet
NCR was at 31.000 feet
The distance between the devices is correct and safe. All aircraft flew in the same direction, possibly at different speeds.
EVA and NCR were warned by the TCAS system, not KLM. It can be deduced from this that only EVA and NCR flew too close above each other. A further conclusion may be that EVA was too low, possibly due to a (small) air pocket. As a result, the distance between KLM and EVA had increased, so that KLM's TCAS system did not raise the alarm.
The EVA aircraft had to ascend again to the original 32.000 feet in order to return to a safe altitude (1.000 feet difference in altitude) with the other two aircraft. However, the NCR pilot initiated an ascent to 35.000 feet without permission from ground control. As a result, the NCR pilot endangered both other aircraft. This was noticed by air traffic control, who instructed NCR not to ascend, but to turn left. Descending of the NCR aircraft would have been obvious, but due to the rise that has started, it seems that there was no time left for this and the order was given to turn to the left.
Because all three aircraft flew in virtually the same direction (KLM and EVA to Bangkok and NCR to Hong Kong), only the speed difference was a significant factor in a possible rear-end collision.
This is my analysis of the India Today report.
The aircraft did not fly in the same direction, National and KLM did, EVA Air had departed from Bangkok and was flying towards Vienna, so opposite
Dear Rudolf, you are absolutely right. A reading error on my part. Thanks for the correction.
The incident was caused by the pilots of the National Air Cargo aircraft. They asked air traffic control to allow them to ascend to 35000 feet (Flight Level 350) and received the answer: 'Standby, expect FL350'. That means 'wait', but nevertheless they already started to ascend.
Source: http://avherald.com/h?article=4c2289f3&opt=0
The incident was initially caused by the Indian air traffic controller, who uses non-standard phraseology and completely unnecessarily calls a FL, then the pilots of the Nacional flight did not listen carefully to what the air traffic controller said and instead of verifying this, started climbing. Murphy's law again in aviation.
Indeed, Rudolph. With all the wonderful systems, agreements, protocols, Standard Operating Procedures, etc., things can still go wrong due to human error.
in case of doubt, a pilot or atc-er should make a say again request and a pilot should do the complete readback of the order.
he probably was into that, moreover, Indians have a strange accent.
if you follow the RT via the scanner, you notice that the construction of the communication is sometimes deviated from.
this just proves how safe a TCAS has made it because it is also a very busy route and area.
Take a look at flightradar24 how they fly there in a traffic jam from Asia to Europe 😉
KLM denies that they were involved. According to them, the incident was between the two aircraft, so eva air and the other aircraft. However, if I follow the news, KLM was still involved. sleeping or watching a movie. It's a good thing you don't see what's happening in the air. A few years ago we flew with Singapore airlines to Australia, our plane also almost collided.
Moderator: After a period comes a space.